Mold for concrete walls.



PATENTED FEB. Z8, 1905.

0. E. WENNBERG.

MOLD FOR CONCRETE WALLS.

APPLIATION FILED APB.15, 1904.

2 BHEBTS-SHEET l.

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3m vente@ @Nom/wg PATENTED PEB. 28, 1905.

' 0. E. WENNBERG. MLD FOR GONGRETE WALLS.

'APPLIUATIoN FILED APR. 15, 1904.

lllill'ci. 783,767.

STATES )Patented February 2B, 1905.

OLOF E. VVENNBERG, 0F CHlCAG-O, lLLINOlS.

MOLD FOR CNCRETE WALLS.

SPECIFICATION formingpart of Letters Patent No. 783,767, dated February28, 1905.

Application filed April 15,1904. Serial No. 203,342.

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Be it known that I, OLoir E. VnNNenne, a citizen of the United States,residing at Chicago, in thc county of Cook and State of illinois, haveinvented a new and useful Improvement in Molds for Concrete Walls, ofwhich the following is a specification.

This invention relates to removable molds for constructingconcrete orretaining walls of any plastic material.

'lhe invention comprises side walls for the mold, the said side wallsbeing held in place by angled interlocking hooks detachable from eachother and inclosing between them the two side walls.

The invention consists in the novel features of construction andcombination of parts here inai'ter described, particularly pointed outin the claims, and shown in the accompanying drawings, in which"- Figurel is a perspective view showing the practical application of my devicein wallbuilding. Fig. 2 is a transverse section through the mold andwall, the section being taken through the longitudinal center of thehook members. Fig. 3 is a perspective view of the frame formed by thehook members when interlocked, the side walls being omitted. Fig. i is adetail perspective View of a method of locking the hook memberstogetlier. Fig. 5 is an end elevation showing a plurality of moldsarranged in vertical alinemcnt. Fig. (-3 is a side elevation of Fig. 5.Figs. 7 and 8 are detail views of construction.

.ln constructing' my mold l employ thc'side members A, which may beplain rectangular boards, and two right-angled hook members B and G,though it will be understood that the angle may bevaried in particularcases and that the hook membcrsB and C may be made in a great variety ofsizes and when interloclied will Vform Vframes of various dimen sions,each 'frame having also a limited amount of adj ustability.

For clearness l have designated the hook member having its horizontalportion resting on the top of the side members A or on the upper edgesof same B and the one upon which the side members A rest C; but it willbe understood that the members B and C are identical in construction,and a detail description of one will apply to both.

Adjacent the free end of the horizontal member of each of the bool;members B and C are formed a plurality of perforations l), and the endof this member is bifureated, as at D', and small perforations areformed on each side of the bifurcation to receive the points of a stapleE, as shown most clearly in Fig. 4. The vertical portion of each hookmember is reduced to form a pin F, adapted to lit in the perfor-ationsUand also to rest in the bifurcations 1) of the coaeting hook member.

In the construction of a wall such as is shown in Figs. Vl and 2 thehooi; members (i are placed in position. lhe sides A are then arrangedin place, being spaced apart the desired width of the wall, and thehooi; member B is then arranged with the igierforated portion restingupon the upper edges of the sides A, one of the perforations engagingthe pin F of the hook member C, and the pin F of the Vertical portion ofthe hook member li likewise engages a correspolnling perforation in thehorizontal portion of the hook member C. The concrete or other plasticmaterial ot' which the wall is to be composed is filled in the mold to alevel with the upper edges of the side members A.. 1When the materialhas set, the hook member B is readily removed, and the boards or planksforming the sides AA are taken down and the hoohv members (l readilywithdrawn from the Vall. 'lhe hook members (l are then placed inposition upon the portion of the wall just formed and a second layersuperimposed thereon. 'lhe holes left in the wall are plastered and thework continued until the Vall has reached the desired height. #Shouldthe sides be spaced too 'far apart to permit thc use of. theperforations l), the pins l" engage the bifurcations D and are heldagainst sliding out of the same by means o f the staples lll.

When desired, as in the case of retainingwalls for railroad embankments,the size of the hook members is chaiiged, and the meer bers G,correspondiiig to the members li, are formed with a greater angle thanthat of a right angle, and the hook members ll are formed with a rightangle, and the frames IOO composed of the members G and H are built upone above the other, as shown in Figs. 5 and 6, each of the hook membersH supporting a set of the side pieces A. vWhere one side of the Wall isinclined, as shown in Fig'. 5, the length of the horizontal portions ofthe hook members G and H are graduated, as shown in Fig. 5.

It will be obvious that the hook members B, C, G, and H may be made inmany sizes and angled in any manner desired without in any waydeparting' from the spirit of my invention, and I do not desirevto belimited to any special size or shape of hook member.

Having thus 'fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A mold of the kind described comprising side pieces, angled hookmembers each having a perforated portion and the remaining portion ot'each hook member having a reduced end, one of said hook members beingadapted to support the side pieces and the other being adapted to resttransversely across the upper edges of the side members.

2. The'combination with the side pieces, of i two angled hook membershaving each a rel duced end portion and a bifnrcated'end porl tion, andhaving perforations formed adjacent i the bifuroated end, the reducedend of one hook member being' adapted to engage the bifurcation of theother hook member, and stal ples adapted to lock the reduced endsagainst horizontal movement in the said bifurcations.

OLOF E. VENNBERG.

lVitnesses:

A. F. LESLIE, J. C. PHILLIPS.

